Compact design fits easily amongst our safety equipment. Bright red bag is easy to see, less likely to be lost. Perfect for helping to secure safety line without having to climb unprotected. With a little practice, fairly easy to use. Stuff bag is perfect for storage and allows tangle free release when perfectly weighted bag is tossed over a roof. I previously attempted various methods using twine, fishing line, string, etc. Throwing, adding weights, using sling shot, bow & arrow, I tried again & again suffering frustration with tangled lines, missed throws, etc. This item has been perfected, so if you need a throw line to get over a branch, or roof, save yourself the frustration I experienced trying to make your own.